P4

P4 may refer to:

Computing

• Intel Pentium 4, a 7th generation processor design
• Intel 80486 architecture, a 4th generation processor design

Hobbies

• P4 gauge for model railways
• Shin Megami Tensei: Persona 4, a video game from Atlus

Media

• P4 Radio Hele Norge (PFI), a Norwegian radio company
  • Kanal 24 (Kanal 4), which acquired the Norwegian P4 channel from PFI
• DR P4, a Danish radio station
• SR P4, a Swedish radio network
• P4 Spółka z o.o., a Polish phone operator

Military

• P 4 class torpedo boat operated by the Chinese Navy
• Skaraborgs regemente (armoured), a Swedish army unit whose designation is P 4
• Fairey P.4/34, a United Kingdom bomber developed in the 1930s
• Peugeot P4, a 4-wheel-drive unarmoured light vehicle used by the Military of France
• Consolidated QP-4 Privateer, a target drone conversion of the United States Navy's PB4Y-2 patrol aircraft.

Politics

• Trans-Pacific Strategic Economic Partnership, a free trade agreement between Brunei, Chile, New Zealand, and Singapore
• Aruba, International Telecommunications Union callsign

Science

• Biosafety level 4, microbiology laboratory safety procedures to handle level-4 pathogens
• Period 4 of the periodic table
• Tetraphosphorus, or white phosphorus, an allotrope of phosphorus
• Perforce, revision control system
• Group p4, the plane symmetry group Wallpaper group p4
• Progesterone (Pregn-4-ene-3,20-dione), a steroid hormone
• P4, the fourth moon of Pluto, discovered in 2011

Transport

• 330 P4, a Ferrari automobile
• Dewoitine P-4, a French aircraft made by Dewoitine
• Pilatus P-4, a Swiss airplane designed during the 1940s
• P4- (plus three letters) is Aruba's aircraft registration prefix
• Rover P4, a series of British cars of the 50s and 60s
• P4 road (Latvia), a first class State road connecting Riga and Ērgļi
• Р 04, Roman script: R 04 road in Ukraine, a state regional road connecting Kiev and Zvenyhorodka

Other

• Papyrus 4, a New Testament manuscript

See also

• 4P (disambiguation)
• Phosphate, molecular formula PO₄^3-

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